The city of became a leading center for muslim scholarship and trade.
cairo
timbuktu
morocco
mali

The correct answer is B. Timbuktu

Explanation:

Timbuktu is a city located in Mali, Africa that became one of the most cities in the region after the 12th century mainly due to its trade and scholar centers. Indeed Timbuktu was a center for trade of salt, gold and event slaves during the 13th century and in subsequent centuries, especially after the 16th century the city played an important role for Islamic scholars as the trade of books was established and an Islamic University was created which made this city one of the most important scholar centers in all the continent and a trade and academic center for Muslims. Therefore, the city that became a center for Mulsim scholarship and trade was Timbuktu.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.